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OSI Systems, Inc.: Spacelabs Healthcare Merger Announcement

HAWTHORNE, CA--(Marketwire - December 20, 2007) - OSI Systems, Inc. announces today that
pursuant to previously published plans it has effected a Delaware
short-form merger of Spacelabs Healthcare (LSE: SLAB). As a result,
Spacelabs Healthcare is now a wholly owned subsidiary of OSI Systems.
Within the next 10 days, notification of the merger, together with details
regarding procedures for claiming the 100p consideration per share, and
related information, will be sent to Spacelabs' pre-merger stockholders.

This press release contains forward-looking statements within the meaning
of Section 27A of the Securities Act of 1933, as amended, and Section 21E
of the Securities Exchange Act of 1934, as amended. Such statements include
information regarding the Company's expectations, goals or intentions about
the future, including the Company's predictions with regard to the
prospective performance of, and market acceptance of, its products. The
actual results may differ materially from those described in or implied by
any forward-looking statement. Other important factors are set forth in our
Securities and Exchange Commission filings. All forward-looking statements
speak only as of the date made, and we undertake no obligation to update
these forward-looking statements.